Every founder asks this question eventually, usually right after losing a candidate in their inbox. The honest answer depends almost entirely on volume.
Most ATS marketing pages won’t tell you this. They want you to buy whether you need it or not.
The three zones
Under 5 hires a year? A spreadsheet is fine. Seriously. A shared Google Sheet with columns for name, role, stage, owner, and next step will carry you further than you think.
Between 5 and 10 hires a year, you’re in the messy middle. You probably don’t need a full ATS yet, but you do need something to stop candidates from slipping through the cracks. A lightweight tool or a trial of a cheap ATS can work here.
Over 10 hires a year, or two or more roles open at once with multiple interviewers per role? You need an ATS. The question flips from optional to urgent around this threshold.
What an ATS actually does (and doesn’t)
Founders often think an ATS will find them better candidates. It won’t. An ATS is a filing cabinet with workflow, not a sourcing engine.
What it actually does: keeps candidates organized across stages, prevents duplicate outreach, stores interview feedback in one place, posts jobs to multiple boards, and gives you basic reporting. Useful, but narrower than the pitch suggests.
What it won’t do: write better job descriptions, screen CVs with any real intelligence, or stop your team from ghosting candidates. Those problems need different tools or, more often, different habits.
The middle-zone playbook
If you’re hiring 5 to 10 people this year, start with the cheapest tool that solves your actual pain. Workable, Recruitee, Breezy, and Pinpoint all have plans under $150 a month. Trial one for 30 days.
Resist the urge to buy Greenhouse or Lever. Those are built for 50-plus headcount recruiting teams, priced accordingly (often $6,000 or more per year), and will slow a small team down with features you don’t need.
The real leverage for small teams isn’t the ATS itself, it’s the filter in front of it. Sieve cuts a 400-applicant pile down to 20 serious candidates in minutes, and works alongside whatever tracking system you pick. See it at sievecv.com.